You've always been unlucky, to compensate You've made yourself the absolute best at everything you do. Can't be unlucky when even you're failures are better than anyone else's best attempts.
Each time you fail a dice roll by more than 5 in an encounter you gain a +1 to add to any other dice roll. These additions are lost when you leave initiative.
When you miss two attacks in a row you can opt at a third attempt at a swing, taking your luck into your own hands. But if you fail a third time you will have to roll a d100 on a critical fail table. But if you succeed it is an auto crit and you gain advantage for anything you do on your next turn.
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